Cake consolidation in a compression-permeability cell: effect of side-wall friction.

A simulation study was made to investigate the transient state stresses, strains, and void ratio distributions in the formation of a filter cake in a compression-permeability cell (C-P cell). A finite-element software package, ABAQUS, was used for the simulation and emphasis was placed on the effect of the cake/cell-surface friction. The validity of the simulation was assessed by comparing simulation results with available experimental data.

Plastic deformation in cake consolidation.

Cake filtration has a variety of applications in wastewater treatment by solid/liquid separation processes. In order to obtain the physical properties of the filter cake, a Compression-Permeability Cell (C-P Cell) can be used to examine the constitutive relationships among the solid compressive stresses, porosity and the specific filtration resistance. In this paper, a mathematical model is proposed to study the transient distribution of stresses, strains and void ratios in the confined cake of a C-P Cell under constant axial loads for dewatering.